US 12,080,344 B2
Radiation hardened e-fuse macro
Jason F. Ross, Haymarket, VA (US)
Assigned to BAE Systems Information and Electronic Systems Integration Inc., Nashua, NH (US)
Filed by BAE SYSTEMS Information and Electronic Systems Integration Inc., Nashua, NH (US)
Filed on Dec. 16, 2021, as Appl. No. 17/552,844.
Prior Publication US 2023/0197149 A1, Jun. 22, 2023
Int. Cl. G11C 11/56 (2006.01); G11C 17/16 (2006.01); G11C 17/18 (2006.01)
CPC G11C 11/5692 (2013.01) [G11C 17/16 (2013.01); G11C 17/18 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A multi-bit, asynchronous e-fuse macro, the macro comprising:
the following inputs: an input output enable, a power on reset, a write address, an input write enable, a ground clamp enable, and a write clock;
a plurality of e-fuse bits, wherein each e-fuse bit comprises at least one radiation hardened latch;
a supply voltage configured to allow programming at least one of the e-fuse bits;
at least one fuse output; and
self-timing and control circuitry configured to perform signaling,
wherein each of the inputs is in electrical communication with said e-fuse macro;
wherein the write address is a variable width bus configured to provide a plurality of write address bits; and
wherein the asynchronous e-fuse macro is configured to:
receive power from the supply voltage when the supply voltage is either floating or grounded;
assert reset, precharge, output enable, and ground clamp while de-asserting read enable, hold, and write enable and disabling read reference current;
de-assert reset while enabling read reference current;
de-assert precharge while asserting read enable;
pulse hold, thereby storing e-fuse memory element values in the at least one latch;
assert precharge while de-asserting read enable; and
disable read reference current.